package com.example.gadgeteer;

import java.io.IOException;
import java.io.OutputStream;
import java.util.UUID;
 
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.TableLayout.LayoutParams;
 
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.pm.ActivityInfo;
import android.graphics.Color;
 
public class ClientSocketActivity extends Activity {
private LinearLayout linearLayout1;
  TextView out;
  private static final int REQUEST_ENABLE_BT = 1;
  private BluetoothAdapter btAdapter = null;
  private BluetoothSocket btSocket = null;
  private OutputStream outStream = null;
  private OutputStream inStream = null;
   
  // Well known SPP UUID
  private static final UUID MY_UUID =
      UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
 
  // Insert your server's MAC address
  private static String address = "00:18:E4:0C:68:09";
 
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    createLayout(); 
    setContentView(linearLayout1);
    out.append("\n...In onCreate()...");
    btAdapter = BluetoothAdapter.getDefaultAdapter();
    CheckBTState();
  }
  
  private void createLayout() {
		linearLayout1 = new LinearLayout(this);
		linearLayout1.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT));  
		linearLayout1.setOrientation(LinearLayout.VERTICAL);
		linearLayout1.setBackgroundColor(Color.WHITE);
		linearLayout1.setId(1000);
		//
		out = new TextView(this);
		linearLayout1.addView(out);
  }
 
  @Override
  public void onStart() {
    super.onStart();
    out.append("\n...In onStart()...");
    BluetoothDevice device = btAdapter.getRemoteDevice(address);
    
    // Two things are needed to make a connection:
    //   A MAC address, which we got above.
    //   A Service ID or UUID.  In this case we are using the
    //     UUID for SPP.
    try {
      btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
    } catch (IOException e) {
      AlertBox("Fatal Error", "In onStart() and socket create failed: " + e.getMessage() + ".");
    }
 
    // Discovery is resource intensive.  Make sure it isn't going on
    // when you attempt to connect and pass your message.
    btAdapter.cancelDiscovery();
 
    // Establish the connection.  This will block until it connects.
    try {
      btSocket.connect();
      out.append("\n...Connection established and data link opened...");
    } catch (IOException e) {
      try {
        btSocket.close();
      } catch (IOException e2) {
        AlertBox("Fatal Error", "In onStart() and unable to close socket during connection failure" + e2.getMessage() + ".");
      }
    }
 
    // Create a data stream so we can talk to server.
    out.append("\n...Sending message to server...");
 
    try {
      outStream = btSocket.getOutputStream();
    } catch (IOException e) {
      AlertBox("Fatal Error", "In onStart() and output stream creation failed:" + e.getMessage() + ".");
    }
 
    String message = "Hello from Android.\n";
    byte[] msgBuffer = message.getBytes();
    try {
      outStream.write(msgBuffer);
    } catch (IOException e) {
      String msg = "In onStart() and an exception occurred during write: " + e.getMessage();      
      AlertBox("Fatal Error", msg);       
    }
    
  }
 
//  @Override
//  public void onResume() {
//    super.onResume();
// 
//    out.append("\n...In onResume...\n...Attempting client connect...");
// 
//    // Set up a pointer to the remote node using it's address.
//    BluetoothDevice device = btAdapter.getRemoteDevice(address);
// 
//    // Two things are needed to make a connection:
//    //   A MAC address, which we got above.
//    //   A Service ID or UUID.  In this case we are using the
//    //     UUID for SPP.
//    try {
//      btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
//    } catch (IOException e) {
//      AlertBox("Fatal Error", "In onResume() and socket create failed: " + e.getMessage() + ".");
//    }
// 
//    // Discovery is resource intensive.  Make sure it isn't going on
//    // when you attempt to connect and pass your message.
//    btAdapter.cancelDiscovery();
// 
//    // Establish the connection.  This will block until it connects.
//    try {
//      btSocket.connect();
//      out.append("\n...Connection established and data link opened...");
//    } catch (IOException e) {
//      try {
//        btSocket.close();
//      } catch (IOException e2) {
//        AlertBox("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + ".");
//      }
//    }
// 
//    // Create a data stream so we can talk to server.
//    out.append("\n...Sending message to server...");
// 
//    try {
//      outStream = btSocket.getOutputStream();
//    } catch (IOException e) {
//      AlertBox("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + ".");
//    }
// 
//    String message = "Hello from Android.\n";
//    byte[] msgBuffer = message.getBytes();
//    try {
//      outStream.write(msgBuffer);
//    } catch (IOException e) {
//      String msg = "In onResume() and an exception occurred during write: " + e.getMessage();      
//      AlertBox("Fatal Error", msg);       
//    }
//  }
 
  @Override
  public void onPause() {
    super.onPause();
 
    out.append("\n...In onPause()...");
 
    if (outStream != null) {
      try {
        outStream.flush();
      } catch (IOException e) {
        AlertBox("Fatal Error", "In onPause() and failed to flush output stream: " + e.getMessage() + ".");
      }
    }
 
    try     {
      btSocket.close();
    } catch (IOException e2) {
      AlertBox("Fatal Error", "In onPause() and failed to close socket." + e2.getMessage() + ".");
    }
  }
 
  @Override
  public void onStop() {
    super.onStop();
    out.append("\n...In onStop()...");
  }
 
  @Override
  public void onDestroy() {
    super.onDestroy();
    out.append("\n...In onDestroy()...");
  }
   
  private void CheckBTState() {
    // Check for Bluetooth support and then check to make sure it is turned on
 
    // Emulator doesn't support Bluetooth and will return null
    if(btAdapter==null) { 
      AlertBox("Fatal Error", "Bluetooth Not supported. Aborting.");
    } else {
      if (btAdapter.isEnabled()) {
        out.append("\n...Bluetooth is enabled...");
      } else {
        //Prompt user to turn on Bluetooth
        Intent enableBtIntent = new Intent(btAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
      }
    }
  }
   
  public void AlertBox( String title, String message ){
    new AlertDialog.Builder(this)
    .setTitle( title )
    .setMessage( message + " Press OK to exit." )
    .setPositiveButton("OK", new OnClickListener() {
        public void onClick(DialogInterface arg0, int arg1) {
          finish();
        }
    }).show();
  }
}

